Boiler



March 29, 1932. T. B. STILLMAN 1,851,466

. BOILEB Orig inal Filed June 11. 1929 2 Sheets-Sheet l INVENTOR ATTORNEYS March 29, 1932. T. B. STILLMAN.

BOILER Orig i"na'1 Filed June 11, 1929 2 Sheets-Sheet 2 F15 III/Ill "I n Patented Mar. 29, 1932 a i THOMAS B. s'riLLMAn, or soU'r-H ORANGE, NEW; JERSEYQASSFIGjNj'Qfi-TQ: a ran ingthe invention.-

COCK & wILoox COMPANY, or BAYONNE, nEvr- Ensnr'A oonronA'rIoN, on NEW JERSEY Application filed June 11, 1929, Serial No.369,6 l ).p ,R enewedJanuar y 25,: r

This invention relates to a novel and iniproved form ofboiler, the novel featuresof which will be; bestunderstocid from the following description and the annexed drawings, in which are shown certain selectediembodiments of the invention and in which: Fig. 1 isa vertical sectional 'view, through one form of boiler constructed according to 1 Fig. 2 is a' fragmenta'ry section taken on the line'2 2ofFig. 1. p Fig. 3 isa fragmentarysection taken onthe line 3+3 of Fig.2, and'Fig. at is a view corresponding to Fig. 1, but showinga different form ofjboiler with thefinvention applied thereto.

Referring'first to Fig. 1, I have shown therein a boiler disposed above afurnace hayinga combustionchamber 1, the boiler consisting of a steam and'water separator in the'form of a drum 2 to which are connected groupsofxdowntake headers 8and uptake headers 4." These headers are connected by a bank of tubes 5, these tubes being arranged in nests with eachnest connecting a'pair of headers, one an uptake header and the other a' downtake header. jEach nest of tubes and V theheaders" which it connects will be referred to'hereinafter as a section, The downtake headers are shown as being connected?"to the drum2 by means of short nipples or pipes ,6 andto a lower chamber"? by means of nipples 8. Similarly, the uptake headers' lare shown as being connected to thedrum 2 by nipples or pipes 9, and to a lower chamber 10 by means of'nipples 11. Inlthis particular formof boiler, there is shownasupe'rheater formed oftuhes 12 conneted at their opposite ends to drums l3.

' With the curved form' of tube' illustrated in Fig. 1, it will ,beseen that the upper ends ofthe headers 4 are at a higherelevationtha'n theupp'erends ofthe'headers 3. "The head' -i ers, both. uptake and downtake', are prefer ably spaced apart as shown in Fig. 2, and] may be of the cylindrical type shownor may be, of any any other, suitable form. The tubes connected tothe headersare entered in holes in the walls thereof," and at least some of "these tubes have *their'ends bent as plainly 1 BOILER; j

'thebank withrelation tothe-tubesin adjs r tioii either Vertically or horizontally,

' on opposite sides of planes which 'erkten b spacing ot tubes across the" baiikfandpat the' 4 same time; permitting moyem'ent' of thecsec "viding a largeheating areaof tubes: 1

shownin Fig. 2, whereby the greaterfportio of the lengths-of the bent tubes-may 'be'fpa'r allel .to the other tubes, and 'whereby the nests of tubes will form a'substantially ycon H tinuousbank across the boiler transve e y to the length of the headerslx The tubes are arranged-in horizontal ro asplainly shown in F ig. 3, and'the spacing of tubes in each raw is preferablyfless -thanza tube diameter and is substantiallynniforni 5 across the :nest and-across 'the b'a'nk formedby 1 'flle l lit fiesera ymli fihe tubes in each *rowa'r'e staggered with respect tothetubesinadjacent'ro vW'itlrthe* above described construction, it will be seen that it i vould be' difiicult io fret move a section consisting of two:headers cjond y in ft i js iiee br h ess the entire section round the-*center e the concentrically curved tubes 5; If ithei tiibes in each horizontal row arethus" closely and uniformly spaced that row entirely across the bankof tubes, and are staggeredf across cent rows, will] be seen 'that lno horizontal v r -M mm nt 1f? e ei 'i P f- 'sible, becaiiuse of overlapping tubes in ad; ai-

cent nests; To-oyercome this difliculty and to make possible the" manipulation or asec pose the tubes "in adj acentsections or/{nests tween these section's. or nests; such planes being indicatedf ylhe lines'14i """'Tlietubes at'the"dgesofradj acent';nestsjarefdlsp close togetherjand close to these plane'sfbut :neyerthelessionopposite sidesjth'eretif,there obtaining;- substantially uniform close tionsJeitherlengthwiseofthe aders y H y the form shown in Fig nht izehtau thisarrangement; a section fm'ayibe m'a'nipu- I Referring to Fig. 4, I have shown therein another form of boiler in which the invention finds utility. In this form, the downtake headers 15 .have their ends closelyadjacent to the steam and water drum 16 and the water chamber}? respectively, to which they are connectedby nipples,- as shovfvh. The uptake headers 18 are longer than "the. clearance ber f tween the drum 16 and chamber 17,- and; a-lsb have'theii' upperends disposedabove the? spear" ehds er thedowntake headers: With this arrangement, it would be difiicult to manipulate a section if the tubes in adj aceiit' nests overla-pped,1 to prevent vertical movement between 's'ctibns, particularly" ifth'ef" [tubes were closely spaced. ,But, with the tubes .5 of this embodiment arranged in the fiannershbwii in Figs. 2 and 3, it Will be 1 seen that ajseetieh inay be-cut loose and then ho iti zontally out tovva'rds the right, as 1 vie'vved in Fig. 4, and then it maylbe til'ted or 1 otherwise manipulated soft-hat the header 18 -fof,th at partieul ar1 section may be Withdrawn through-the spate etween the drum is and theat r 17. I

I p I 1; 1's shown, the headersare ref- ,erably su pgilied vvith the usual longitudinale seriesgof handholes 19 provided vvith t "e usual 20,lthese handholes fur; nis'h ing access tothe tubes which are coneb'ted into, the oppesite' walls of the headers.

v; ,f'lfclai mi W; 'l.-flI-fifafiw'ater, tubeboiler, argroup; er verjtical-1y seaming headers cenn' ete am to bhambets idispose'd elb'sely adjacentsaid en s, a second groupbf headers .'o 1metfeu to the first group bytubesforsubsen-tallying entire length or the ii-rammed headers, the hea ers the second group be;

mg wa er-measles entrance etween Sa fehafnber tH adjacentheaders in each group spaced apart at least some of said 7 tubes; tiem'gbent l atftheir ends "to enter holes in "the vv allsfof the headers, the tiibes pefnneqtedterwoaajaeeatleaders ifna grb 'p being disposedlfor substantially thei'rfentire lengths on opposite ."s i-des of a lplaneektend mg between "said 'ad e'centheaa rs.

ZIn tet tube boiler, a; luralit'v of secthan atubediameter, and'the tubes-in the la djacent -nests forming a substantially continuous transversely extending bank oftubes,

the tubes at the edg esof adjacentnests being spaced apart,v a distance greater than'a tube diameter and-being disposed on opposite; 1

sides of a plane separating said nests but closely adjacent to said plane, Whereby'a section may be moved longitudinally of the headers without havingthe tubes thereinen gagingthe tubes in adjacent nests.

sections arranged side by side, each section comprising an uptake and a downtake header connectedby a nest of tubes; adjacent uptake and adjacent downtake headersbeing spaced apart, at least some of the tubes in the nest being-bent at their ends-to enter holes inthe Walls of saidheaders, asteam and va ter separator common tofa group of headers a t-one end of thesectiions; pipes connecting' V theend portions of both uptake and downtake headers to. said separator, th etubes in each nest being" substantially unifornil spaced apart transversely of the headers, an

the tubes in'the adjacentnests forminga substantially continuous transversely extend:

as bank of tubes, the be t'i edges adjacent nests being l fip i aistainc-i-ei I reater than th distancsbetiwefi tubes with in thenests and disposed on opposite sides. of

a plane separating said inestsv but lclose'l y ad 'jac'entto said planej 'wherebya-seetio'n. I be moved longitudinally of'the headers 'wi'thfl tubesin adjacent nests.

out having the tubes'therein engagingfthe Ina ater tubebo'iler, aplurality onsarran'ged side side, eachsectio'n'comg prising an uptake and a dovvntake header connected by a nest of tubes'vvith said uptake and 'doWntake headers disposed" at an angle toieachother and with said tubes in the nest disposed substantially on arcs of concentric circles, adjacent uptake and adjacent down-j takeheaders being spaced'apart,;atleast some io fgthe tubes inthe nestflbeing bent at their endstoenter :holes in the vvallsof saidjheaders, a steani and Water separator commont'o a lgroup of headers ats' one end, ofafsec'tion, pipesconnectingtheendportionsofbothupQ 1 take and dovvntake headers to said'sepa-r'ator; thegtubes in each nest being substantially uniformlyspaced apart transversely ofthe headl- .ers, and the tubes in theadjacentnestsiforing 1 ing a substantially continuous transversely' I extending bank of .tubesft'he tubes atthe edges of adjacent"nestsbeing-spaced apart a distance greater thana'the distance'betvueen 3 tubes within. t-he. nests and disposed on ope" iposite s'idesQof aplanefseparating said n ests but closely adjacent to said plane, whereby a fsection may be moved longitudinally bf "the headers vvithout having: the tubes therei inengag'ing the tubesin adjacent nests, v

In avvater tube.boiler -a plurality off sections arranged sideby side,..e a'ch section comprising an uptake and a downtake header connected by anest of tubes with said up; f

3. Ina Watertubeboiler, a plurality of.

take and doWntake headers disposed at an angle to each other and with said tubes in the nest disposed substantially on arcs of concentric circles, adjacent uptake and, adjacent downtake headers being spaced apart, at least some of the tubes in the nest being bentv at their ends to enter the holes in the Walls of said headers, a steam and Water separator common to a group of headers at one end of a section, pipesconnecting the end portions of bothuptake and doWntake headers to said separator, the tubes in each nest being substantially uniformly spaced apart transverse- 1y of the headers a distance less than a tube diameter, and the tubes in the adjacent nests forming a substantially continuous transversely extending bank of tubes, the tubes at the edges of adjacent nests being spaced apart a distance greater than a tube'diameter and being disposed on opposite sides ofra plane separating said nests but closely adjacent to said plane, whereby a section may be moved longitudinally of the headers Without having the tubes therein engaging the tubes in adjacent nests.

THOMAS B. STILLMAN, 

